(1) In the GDDM function, a directed line segment, which is a straight line between two points.
(2) In SNA, a data structure containing three fields: a length field that specifies the length of the vector in which it is contained, an identifier or type field, and a value field. The value field may contain subvectors.
(3) An array of one dimension.
(4) A linearly ordered collection of scalars of the same type. Each scalar is said to be an element of the vector. See also array, scalar.